not sure if it was a typo, but you have your lighting regimen backwards. metal halide has a higher kelvin rating, therefore its better for veg. high pressure sodium is the opposite, with a lower kelvin rating, and is best for flower.

as for your cloning, maybe do a search on here for DIY bubble cloner. cost me about $20 to get one built, and it works like a charm!

and for cloning that one thats a month into flower, it is possible. its not super likely to succeed, but it can be done. i've cloned from a plant 45 days on flower successfully.

at the end, i see you mentioned that your plants grow "tall and lanky." this is precisely what can happen when incorrect light spectrums are used at inappropriate times. HPS light during veg causes stretching (tall) and MH light during flower causes loose, fluffy buds (lanky).

hope i've helped!
best of luck and stay safe!
-GG84